Granted Patent
Utility
US 6,486,222 · App. 09/828,721
Combination ion exchange resin bed for the synthesis of bisphenol A
Inventors:
Gaylord M. Kissinger, Sheldon J. Shafer, Harish Radhakrishna Acharya, Rudy Francois Alain Jos Peemans, Eduard Hendricus Schlarmann
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Apr 9, 2001
Inventors
Gaylord M. Kissinger
Sheldon J. Shafer
Harish Radhakrishna Acharya
Rudy Francois Alain Jos Peemans
Eduard Hendricus Schlarmann
Assignee (at issue)
General Electric Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.